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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2006-11-13 to 2006-12-07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
1995
Deviations:
yes
Remarks:
temperature being 21.5 C above 20°C
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
1992
Deviations:
yes
Remarks:
temperature being 21.5 C
GLP compliance:
yes (incl. QA statement)
Remarks:
2003
Type of method:
plate method
Key result
Surface tension:
64.79 mN/m
Temp.:
21.5 °C
Remarks on result:
other: classified as not surface active

Measurement 1, 11.34 h

Time

 Mass

Surface tension

Temperature

No.

s

g

mN/m

°C

1

3.0

0.2646

64.55

21.4

2

6.0

0.2652

64.69

21.4

3

8.9

0.2649

64.62

21.4

4

12

0.2646

64.55

21.4

5

15

0.2648

64.60

21.5

6

18

0.2645

64.52

21.5

7

21

0.2640

64.40

21.5

8

24

0.2647

64.57

21.5

9

27

0.2645

64.52

21.5

10

30

0.2644

64.50

21.5

Mean

-

0.2646

64.55

-

Stand Dev.

-

0.0003

0.08

-

Measurement 2, 12.38 h

Time

Mass

Surface tension

Temperature

No.

s

g

mN/m

°C

1

3.0

0.2665

65.01

21.4

2

5.9

0.2666

65.04

21.4

3

8.9

0.2663

64.96

21.4

4

11.9

0.2666

65.04

21.4

5

14.9

0.2665

65.01

21.4

6

17.9

0.2663

64.96

21.4

7

21

0.2666

65.04

21.4

8

23.9

0.2667

65.06

21.4

9

26.9

0.2670

65.13

21.4

10

29.9

0.2666

65.04

21.4

Mean

-

0.2666

65.03

-

Stand Dev.

-

0.0002

0.05

-

no significant variation (0.74%) of recorded values.

Conclusions:
The surface tension of an aquous solution (90% saturation) was determined as 64.79 +-0.34 mN/m at 21.5°C being the mean of two measurements in accordance with the official OECD Test Guideline No 115 (1995) and EC method A.5 (1992). No significant changes and thus no significant dependence on time and temperature was observed . The test item is classified as not surface active .

Description of key information

Surface tension: 64.79 nM/m +/-0.34 mN/m at 21.5°C and at 90% saturation . The test item is classified as not surface active.

Method: OECD Test Guideline 115 (1995) and the EC Method A.5 (1992) (by Plate Method).

Key value for chemical safety assessment

Surface tension:
64.79
in mN/m at 20°C and concentration in mg/L:
2.8

Additional information

The surface tension of an aquous solution (90% saturation equivalent to a concentration of 2.8 mg/L) was determined as 64.79 +-0.34 mN/m at 21.5°C being the mean of two measurements.